Raise exceptions on "org.freesmartphone.GSM.SIM.DeleteMessage" failures.

[TAsn]

Currently fsogsmd doesn't raise any error when I try to delete a message that's already deleted, it just silently ignores. When you try to delete an invalid index, i.e try delete message #30 in a sim with 20 messages slots, you get: org.freesmartphone.GSM.DeviceFailed?: +CMS ERROR: 302 Instead of a nice clean "org.freesmartphone.GSM.SIM.InvalidEntry?".